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Showing result 1 - 5 of 19 swedish dissertations matching the above criteria.
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1. First-principles Studies of Local Structure Effects in Magnetic Materials
Abstract : This thesis focus on the magnetic behavior, from single atoms to bulk materials. The materials considered in this thesis have been studied by computational methods based on ab initio theory, density functional theory (DFT), including treatment of the spin-orbit coupling, non-collinear magnetism, and methods capable of treating discorded systems. READ MORE
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2. Theoretical Studies of Magnetism and Electron Correlation in Solids
Abstract : This work presents new development and applications of ab-initio simulation tools for material science. Focus lies on materials with strong electronic correlation and strong spin-orbit coupling. READ MORE
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3. Cohesive and Spectroscopic properties of the Lanthanides within the Hubbard I Approximation
Abstract : We describe the rare-earth elements using the Hubbard I approximation. We show that the theory reproduces the cohesive properties, like the volume and bulk modulus, and we find an excellent agreement between theory and experiment for the (inverse) photo emission spectra of the valence band. READ MORE
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4. Periodized Thermal Greens Functions and Applications
Abstract : This work describes a new formalism for Fermionic thermal Greens functions that are discretized in imaginary time. The discretization makes the thermal Greens function periodic in imaginary (Matsubara) frequency space and requires a generalisation of the Dyson equation and Luttinger-Ward-Baym-Kadanoff functional. READ MORE
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5. Correlated Electronic Structure of Materials : Development and Application of Dynamical Mean Field Theory
Abstract : This thesis is dedicated to the development, implementation and application of a combination of Density Functional Theory and Dynamical Mean Field Theory. The resulting program is shown through several examples to be a powerful and flexible tool for calculating the electronic structure of strongly correlated materials. READ MORE